Newt Gingrich’s political groups raised more than $4.2 million in the last three months of 2010, bringing the former House speaker’s total to $14.5 million for the year – a sum that far eclipses his potential rivals for the 2012 Republican presidential nomination. Gingrich, who has increasingly signaled his desire to enter the race to take on President Barack Obama, raised more last year than the three next most prolific fundraisers eying Republican presidential bids combined – former Govs. Mitt Romney of Massachusetts (whose political committees brought in $6.3 million in 2010), Sarah Palin of Alaska ($3.5 million) and Tim...